Free WHOIS Lookup Tool - Check Domain Information
Instantly lookup domain registration information including registrar, registration date, expiration date, nameservers, and domain status. Free unlimited WHOIS/RDAP queries for .com, .net, .org, .io, .ai, and more.
Enter Domain Name for WHOIS Lookup
Supported domains: .com, .net, .org, .io, .ai, .co, .me, .info, .biz, .us
What is WHOIS Lookup?
WHOIS lookup is a widely used internet protocol that allows you to query databases containing information about registered domain names. When you perform a WHOIS lookup, you can discover essential details about a domain including its registrar, registration date, expiration date, nameservers, and contact information (when available).
Our tool uses the modern RDAP (Registration Data Access Protocol), which is the successor to traditional WHOIS. RDAP provides structured JSON data, better security, and improved privacy protection while maintaining full compatibility with domain registration information standards.
What Information Can You Find with WHOIS?
📅 Registration Dates
Find out when the domain was first registered, when it expires, and when it was last updated. This helps you understand domain age and renewal status.
🏢 Registrar Information
Discover which company is managing the domain registration. This is useful for transfers, renewals, or resolving technical issues.
🖥️ Nameservers
See which DNS servers are responsible for the domain. This helps identify hosting providers and DNS configurations.
✅ Domain Status
Check the current status codes like "active", "clientTransferProhibited", or "pendingDelete" to understand domain state and security settings.
🔒 DNSSEC Status
Verify if the domain is protected by DNSSEC (Domain Name System Security Extensions) for enhanced security against DNS attacks.
👤 Privacy Protection
See if the domain owner is using privacy protection services to keep personal information confidential per GDPR regulations.
Why Use WHOIS Lookup?
Domain Availability Research
Check if a domain is registered or available for purchase. Find out when it expires and potentially acquire it.
Security Investigation
Investigate suspicious domains for phishing, spam, or fraud. Identify domain age and registrar for security analysis.
Competitive Research
Research competitor domains to understand their infrastructure, hosting providers, and registration history.
Technical Troubleshooting
Verify nameserver configurations, check DNS settings, and troubleshoot domain-related technical issues.
Business Due Diligence
Perform due diligence when acquiring domains or businesses. Verify ownership history and registration details.
Contact Domain Owners
Find contact information (when available) to reach out to domain owners for partnership or acquisition opportunities.
WHOIS vs RDAP: What's the Difference?
| Feature | Traditional WHOIS | RDAP (Modern) |
|---|---|---|
| Protocol | Port 43 (Plain text) | HTTPS/JSON (Secure) |
| Data Format | Unstructured text | Structured JSON |
| Security | No encryption | HTTPS encrypted |
| Internationalization | Limited (ASCII only) | Full Unicode support |
| Privacy Protection | Basic | Advanced (GDPR compliant) |
| Access Method | Command-line tool | Web API (Browser-friendly) |
Understanding Domain Status Codes
✅ active / ok
Domain is active and operational with no restrictions.
🔒 clientTransferProhibited
Domain is locked and cannot be transferred to another registrar (security feature).
🔒 clientDeleteProhibited
Domain is protected from deletion (security feature).
🔒 clientUpdateProhibited
Domain information cannot be updated without contacting registrar (security feature).
⚠️ pendingDelete
Domain is scheduled for deletion and will soon become available.
⏳ redemptionPeriod
Domain expired and is in grace period. Owner can still renew but at higher cost.
Frequently Asked Questions
Is WHOIS lookup free?
Yes! Our WHOIS lookup tool is completely free with unlimited queries. We use RDAP protocol which provides free access to domain registration information from official registries.
Why can't I see the domain owner's personal information?
Due to GDPR and privacy protection regulations, personal information of domain registrants is often redacted or hidden behind privacy services. Only essential technical and administrative information remains publicly available.
Which domain extensions are supported?
We support the most popular TLDs including .com, .net, .org, .io, .ai, .co, .me, .info, .biz, and .us. We're continuously adding support for more domain extensions.
How accurate is WHOIS data?
WHOIS/RDAP data is highly accurate as it comes directly from official domain registries and registrars. The information is updated in real-time when domain details change.
Can I use WHOIS to check domain availability?
Yes! If our WHOIS lookup returns "Domain not found", it typically means the domain is available for registration. However, always verify with a domain registrar before attempting to purchase.
What is DNSSEC and why is it important?
DNSSEC (Domain Name System Security Extensions) adds security to DNS by digitally signing data. It protects against DNS spoofing and cache poisoning attacks, ensuring users reach the legitimate website.
How often should I check my domain's WHOIS information?
It's good practice to check your domain's WHOIS information quarterly to ensure accuracy, verify expiration dates, and confirm your privacy settings are working correctly.
Can I transfer my domain if it shows "clientTransferProhibited"?
You'll need to contact your current registrar to unlock the domain first. This security status prevents unauthorized transfers and can be removed by the domain owner through their registrar.
What's the difference between registration date and updated date?
Registration date is when the domain was first registered. Updated date reflects when any domain information was last modified (nameservers, contact info, etc.). This helps track domain history.
Is it safe to use WHOIS lookup tools?
Yes, using WHOIS lookup tools is completely safe. We only retrieve publicly available information from official registries using secure HTTPS connections. No personal data is collected or stored.
Ready to Lookup Domain Information?
Get instant access to domain registration details, expiration dates, nameservers, and more with our free WHOIS lookup tool.